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KMID : 1024520070160091077
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Journal of the Environmental Sciences
2007 Volume.16 No. 9 p.1077 ~ p.1083
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Lee Dong-Sub
Park Jin-Sick
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Abstract
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[ ] catalyst impregnated ceramic candle filters are in principle, capable of performing shallow-bed dust filtration plus a catalytic reaction, promoted by a catalytic deposited in their inner structure. Pilot-scale catalyst impregnated ceramic candle filters were prepared, characterized and tested for their activity towards the SCR reaction. The effect on NO conversion of operating temperature, gas hourly space velocity, amount of deposited catalyst, pressure drops and long-term experiment (life of catalytic filter) was determined. The following effects of catalyst impregnated ceramic candle filters in SCR reaction are observed: (1) It increases the activity and widens the temperature window for SCR. (2) When the content of catalyst increases further from 3 to 9wt.%, activity of NO increases. (3) NO conversion at first increases with temperature and then decreases at high temperatures (above over), possibly due to the occurrence of the ammonia oxidation reaction.
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KEYWORD
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Catalyst impregnated ceramic candle filter, SCR
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